I have never owned a mixed breed dog! Even growing up, we had a springer, a beagle, a manchester, a lab, a wire hair fox terrier...in my adult life, I have had 2 gsds and a cocker. I have also rescued and placed a rott and a German shorthair.
I think I am a purebred snob!
So, I asked my parents...and neither of them have ever owned a mixed breed either!